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H. HARTIG.

' GAS ENGINE. "155324554. d Patented Aug. 18, 1885.

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H. HARTIG.

GAS ENGINE.

N0. 324,554. Patented Aug. 18,1885.

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'TBPEGIIEECATION forming part of Letters Patent No. 324,555, datedAugust 18, 1835.

Application filed June 10, 1885. (No model.)

To (ZZZ whom it imy concern:

Be it known that I, HENRY IIARTIG, of Brooklyn, in the county of Kingsand State of New York, have invented certain new and useful Improvementsin Gas-Engines, of which the following is a specification.

This invention relates to a gasengine in which the valve for supplyingthe explosive :gasand air mixture is located at the interior of thereciprocating piston and oscillated by the piston-rod, whereby theconstruction of the engine is simplified and made very compact, so as tobe specially adapted for running sewing-machines and similar machines;and the invention consists of a cylinder having inlet ports for the gasand air, an exhaust-port for the products of combustion, and anignitionport, a hollow reciprocating piston having inlet and exhaustports communicating with the inlet and exhaust ports of the cylinder,and a hollow extension having an ignition-port. An oscillatingslide-valve is located in a cavity at the interior of the piston andconnected by the piston-rod to the driving-shaft, which turns inbearings of a snpportingstandard attached to the cylinder.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved ,gasengine; Fig. 2, an end elevation. Figs. 3 and at arevertical central sections of the same, showing the piston at diftercntpositions of its stroke. Fig. 5 is a detail side View of the piston; andFig. 6 is a horizontal section on line :0 m, Fig. 3.

Similar letters of reference indicate corresponding parts. i

A in the drawings represents the cylinder of my improved gas-engine, thecylinder be ing supported in vertical or horizontal position on asuitable foundation-plate, A. The cylinder A is closed at one end andopen at the opposite end, through which a piston-rod, 13, extends intothe recessed outer end of a re ciprocating piston, D, the piston-rodbeing attached to an oscillating slide-valve, C, that turns in bearingsat the interior of the piston D. The driving-shaft E is supported inbean ings of a standard, E, attached to the main cylinder A, andprovided at the outer end with a flywheel, E and a erankdisk, E, at thein nerend of the main shaft.

The cylinder A is provided at one side with gas and air admission portsa. a, and at the other side with an exhaust-port, (L2, for the productsof combustion. The gasinlct port a is connected with a supply pipe, I),having a stopcock and gas-bag, as customary in gascngiues, forregulating the supply of gas to the engine. A downwardly-extending gas.pipe, 1), extends from the gas-pipe 1) toward the lower part of thecylinder A, and is provided with a jethole, if, through which thegas'i'or the ignition'jet is supplied. A chimney, A is attached to thecylinder A vcrtically above the ignition-jet for drawing the flame inupward direction toward the ignitionport a, which islocated in the cylindcr A above the ignition-jet.

lhe piston D is provided at one side with gas and air ports (I d, and atthe opposite side with an exhaustport, it, which ports register at theproper time with the inlet and exhaust ports a, a, and a of the cylinderA. The in nor end of the piston D is made in the shape of a hollow cup,so as to form, with the closed end of the cylinder A, acombustion-chambor for the air and gas mixture. "he hollow end orextension of the piston l) is provided with an ignition-port, (Z thatregisters with the ignition-port a of the cylinder A. Thecombustion-chamber communicates by a central port, 0, of the piston withthe inlet-cavity or exhaust-cavity of the slide-valve, and with theinlet or exhaust ports of the piston and cylinder, according to theposition the piston and slide-valve.

The slide-valve G is made of slightly-tapering shape and fittedaccurately into a corresponding cavity of the piston. The slidevalve Gis held in position in the piston by a spiral spring, 0, which is setinto a socket, 0, of the slide-valve, and retained by a plate, a, thatis supported by transverselips c of the piston, as shown in 5 and 6.

hen the piston D arrives at the extreme ends of its stroke, theslide-valve G shuts oil completely the communication be tween thecombustionchamber of the cylinder and the inlet and exhaust ports, asshown in Fig. 1. "When the piston is moved by the fly-wheel away fromthe closed end of the cylinder, it turns the slide-valve C, so as toestablish communication between the coinbustion-chamber and the gas andair admission ports until the required quantity of gas and air is suckedin. At this point the ignitionports of the cylinder and piston registerwith each other, the ignition-jet is sucked in, and the explosion takesplace. By the force of the explosion the piston is moved toward theopposite end of its stroke, and the slide-valve turned by the fly-.wheeland crank-disk, so as to establish communication between thecombustion-chamber and the exhaust-ports of the piston and cylinder forthe escape of the products of combustion. The fly-wheel moves the pistonback to its first position, when the same operation is repeated, thesuccessive explosions of the gas and air mixtures and the momentum ofthe fly-wheel keeping up the regular motion of the driving-shaft, ascustomary in gas-engines of this class.

The advantages of my improved gas-engine are simplicity of construction,as there are few Working parts, compactness of construc tion, as theslide-valve is locatedwithin the piston, and easy and effective motion,with but little wear of the working parts.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination of acylinder having the usualinlet, exhaust, and ignition ports, a hollow reciprocating piston havingsimilar ports registering with the ports of the cylinder, an oscillatingslide-valve located at the interior of the piston, and a piston-rodsecured to the slide-valve and connected to the driving-shaft,substantially as set forth.

2. The combination of a cylinder provided with gas and air inlet ports,an ignition-port, and an exhaust-port, a hollow reciprocating pistonhaving gas andair inlet ports, an exhaust-port, and a cup-shapedextension with an ignition'port, and an oscillating slide valve locatedat the interior of the piston and connected by a piston-rod with thedriving-shaft, substantially as set forth.

In' testimony that I claim the foregoing as my invention, Ihave signedmy name in presence of two subscribing witnesses.

HENRY HARTIG.

WVitnesses:

PAUL GOEPEL, CARL KARP.

